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HALOWERK Eastern Land – Croatia Mean Surface Slope
x402
HALOWERK Eastern Land – Croatia Mean Surface Slope is a paid API for AI agents from ostland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Returns the mean first-order surface gradient (slope) across the analysis grid for a given coordinate within Croatia's boundary.
Price / call$0.003
Success—
StatusUnknown
How this service works
Mean first-order surface gradient across the analysis grid. The coordinate is validated against the Natural Earth boundary for Croatia; results outside it are rejected before payment.
Output
A numeric value representing the mean first-order surface gradient (slope) across the analysis grid centered on the requested coordinate within Croatia. Coordinates outside the Natural Earth boundary for Croatia are rejected before any charge is applied.
Example use cases
Agricultural land suitability assessment
“I'm evaluating a parcel near latitude 45.8, longitude 15.9 in Croatia for farming — can you get me the mean slope of the terrain there so I know if it's suitable for machinery?”
Erosion risk screening for construction
“We're planning a development project at coordinates 44.1 latitude, 16.5 longitude in Croatia — what's the average surface slope at that point so we can assess erosion risk?”
Hiking trail feasibility check
“Can you check the mean terrain gradient at latitude 45.2, longitude 17.0 in Croatia? I'm trying to figure out how steep that area is for a trail route we're planning.”
Technical details
Endpoint
POSThttps://ostland.halowerk.com/v1/hr-mean-slopeWhen to prefer
Choose this endpoint when you need the mean (average) surface slope metric specifically for a coordinate within Croatia, as opposed to maximum slope, elevation range, or other terrain derivatives. It is distinct from sibling endpoints offering max gradient, elevation standard deviation, or ruggedness index. Ideal for agricultural, environmental, or construction workflows requiring a smooth, averaged gradient signal rather than extreme values.
Side effects
- Coordinate outside Croatia's Natural Earth boundary — request rejected before payment with a boundary validation error
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Malformed or missing latitude/longitude fields — request rejected with input validation error
- Network timeout or service unavailability — HTTP 5xx response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| latitude | number | WGS84 latitude inside the published European coverage. |
| longitude | number | WGS84 longitude inside the published European coverage. |
Tags
x402
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